Cannot search file in Alfresco 2016 DEC community edition

[houocean]

I installed Alfresco 2016 DEC community edition but I cannot search any file; I installed Alfresco 2016 May version, it was perfect for me to do search file; anyone can help? please advise me.

I compared search filters in search manager, they are default and same.

I didn't add and change anything, it was so strange!

[houocean]

I checked the log, please see the below,

at org.alfresco.httpclient.AbstractHttpClient.executeMethod(AbstractHttpClient.java:135)
at org.alfresco.httpclient.AbstractHttpClient.sendRemoteRequest(AbstractHttpClient.java:111)
at org.alfresco.httpclient.HttpClientFactory$HttpsClient.sendRequest(HttpClientFactory.java:408)
at org.alfresco.solr.client.SOLRAPIClient.getModelsDiff(SOLRAPIClient.java:1154)
at org.alfresco.solr.tracker.ModelTracker.trackModelsImpl(ModelTracker.java:249)
at org.alfresco.solr.tracker.ModelTracker.trackModels(ModelTracker.java:207)
at org.alfresco.solr.tracker.ModelTracker.doTrack(ModelTracker.java:167)
at org.alfresco.solr.tracker.AbstractTracker.track(AbstractTracker.java:185)
at org.alfresco.solr.tracker.TrackerJob.execute(TrackerJob.java:47)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:563)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
at sun.security.validator.Validator.validate(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
... 30 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
at java.security.cert.CertPathBuilder.build(Unknown Source)

looks like certification issue?